First insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef

Abstract Benthic cyanobacterial mats (BCMs) are becoming increasingly common on coral reefs. In Fiji, blooms generally occur in nearshore areas during warm months but some are starting to prevail through cold months. Many fundamental knowledge gaps about BCM proliferation remain, including their com...

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Autores principales:	Amanda K. Ford, Petra M. Visser, Maria J. van Herk, Evelien Jongepier, Victor Bonito
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/372e05f3161f41a88b541214870679b8
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spelling	oai:doaj.org-article:372e05f3161f41a88b541214870679b82021-12-02T14:23:32ZFirst insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef10.1038/s41598-021-84016-z2045-2322https://doaj.org/article/372e05f3161f41a88b541214870679b82021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84016-zhttps://doaj.org/toc/2045-2322Abstract Benthic cyanobacterial mats (BCMs) are becoming increasingly common on coral reefs. In Fiji, blooms generally occur in nearshore areas during warm months but some are starting to prevail through cold months. Many fundamental knowledge gaps about BCM proliferation remain, including their composition and how they influence reef processes. This study examined a seasonal BCM bloom occurring in a 17-year-old no-take inshore reef area in Fiji. Surveys quantified the coverage of various BCM-types and estimated the biomass of key herbivorous fish functional groups. Using remote video observations, we compared fish herbivory (bite rates) on substrate covered primarily by BCMs (> 50%) to substrate lacking BCMs (< 10%) and looked for indications of fish (opportunistically) consuming BCMs. Samples of different BCM-types were analysed by microscopy and next-generation amplicon sequencing (16S rRNA). In total, BCMs covered 51 ± 4% (mean ± s.e.m) of the benthos. Herbivorous fish biomass was relatively high (212 ± 36 kg/ha) with good representation across functional groups. Bite rates were significantly reduced on BCM-dominated substratum, and no fish were unambiguously observed consuming BCMs. Seven different BCM-types were identified, with most containing a complex consortium of cyanobacteria. These results provide insight into BCM composition and impacts on inshore Pacific reefs.Amanda K. FordPetra M. VisserMaria J. van HerkEvelien JongepierVictor BonitoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Amanda K. Ford Petra M. Visser Maria J. van Herk Evelien Jongepier Victor Bonito First insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef
description	Abstract Benthic cyanobacterial mats (BCMs) are becoming increasingly common on coral reefs. In Fiji, blooms generally occur in nearshore areas during warm months but some are starting to prevail through cold months. Many fundamental knowledge gaps about BCM proliferation remain, including their composition and how they influence reef processes. This study examined a seasonal BCM bloom occurring in a 17-year-old no-take inshore reef area in Fiji. Surveys quantified the coverage of various BCM-types and estimated the biomass of key herbivorous fish functional groups. Using remote video observations, we compared fish herbivory (bite rates) on substrate covered primarily by BCMs (> 50%) to substrate lacking BCMs (< 10%) and looked for indications of fish (opportunistically) consuming BCMs. Samples of different BCM-types were analysed by microscopy and next-generation amplicon sequencing (16S rRNA). In total, BCMs covered 51 ± 4% (mean ± s.e.m) of the benthos. Herbivorous fish biomass was relatively high (212 ± 36 kg/ha) with good representation across functional groups. Bite rates were significantly reduced on BCM-dominated substratum, and no fish were unambiguously observed consuming BCMs. Seven different BCM-types were identified, with most containing a complex consortium of cyanobacteria. These results provide insight into BCM composition and impacts on inshore Pacific reefs.
format	article
author	Amanda K. Ford Petra M. Visser Maria J. van Herk Evelien Jongepier Victor Bonito
author_facet	Amanda K. Ford Petra M. Visser Maria J. van Herk Evelien Jongepier Victor Bonito
author_sort	Amanda K. Ford
title	First insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef
title_short	First insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef
title_full	First insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef
title_fullStr	First insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef
title_full_unstemmed	First insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef
title_sort	first insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/372e05f3161f41a88b541214870679b8
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First insights into the impacts of benthic cyanobacterial mats on fish herbivory functions on a nearshore coral reef

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